3818981728 has 24 divisors (see below), whose sum is σ = 7960893192. Its totient is φ = 1797167616.

The previous prime is 3818981713. The next prime is 3818981759. The reversal of 3818981728 is 8271898183.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3509550 + ... + 3510637.

It is an arithmetic number, because the mean of its divisors is an integer number (331703883).

Almost surely, 2^3818981728 is an apocalyptic number.

It is an amenable number.

3818981728 is an abundant number, since it is smaller than the sum of its proper divisors (4141911464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3818981728 is a wasteful number, since it uses less digits than its factorization.

3818981728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020214 (or 7020206 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 55.

The square root of 3818981728 is about 61797.9103853844. The cubic root of 3818981728 is about 1563.0847530632.

The spelling of 3818981728 in words is "three billion, eight hundred eighteen million, nine hundred eighty-one thousand, seven hundred twenty-eight".